Simple Interest Calculator

Principal Amount


Rate of interest(p.a)


Time period


Principal Amount


Total Interest


Total Amount


Principal Amount
Total Interest
Understanding Simple Interest and Using Zactor Tech's Calculator

Simple interest is a basic financial concept that plays a crucial role in various aspects of personal and business finance. Whether you're planning to invest, borrow, or save money, understanding how simple interest works is essential.

What is Simple Interest?

Simple interest is a method of calculating interest on a principal amount over time. Unlike compound interest, which accumulates interest on both the principal and previously earned interest, simple interest is calculated only on the original amount. The formula for simple interest is:

Simple interest follows a straightforward principle:

Interest = Principal x Rate x Time


Interest : The amount you earn or pay over the specified time period.

Principal : The initial amount of money involved, either loaned or invested.

Rate : The annual percentage interest charged or earned (expressed as a decimal).

Time : The duration in years you borrow or invest the money.

Let's understand the workings of the simple interest calculator with an example. The principal amount is Rs 10,000, the rate of interest is 10% and the number of years is six. You can calculate the simple interest as:

A = 10,000 (1+0.1*6) = Rs 16,000.

Interest = A - P = 16000 - 10000 = Rs 6,000.

How to use Zactor Tech's Simple Interest Calculator

Here's a quick guide

  • Enter Principal Amount : Input the initial sum you're borrowing or investing.

  • Choose Interest Rate : Estimate the annual percentage rate applicable to your loan or savings account.

  • Set Time Period : Select the duration in years for which the interest applies.

  • Click Calculate : Witness the magic! The calculator reveals the total interest earned or paid, along with a clear breakdown of the principal and interest components.

Benefits of Zactor Tech's Simple Interest Calculator
  1. User-Friendly Interface : Zactor Tech's Simple Interest Calculator is designed with a straightforward interface, making it accessible for beginners.

  2. Instant Results : The calculator provides quick and accurate results, saving time for users in need of immediate calculations.

  3. Versatility : Whether you're a student learning about simple interest or a professional making financial decisions, Zactor Tech's calculator caters to a wide range of users


Understanding simple interest is crucial for making informed financial decisions. It allows individuals and businesses to estimate interest earnings or costs accurately.

Zactor Tech's Simple Interest Calculator serves as a valuable tool for anyone dealing with financial calculations. Whether you're a beginner or a seasoned financial professional, this calculator enhances efficiency and accuracy in determining simple interest. Embrace the power of understanding and utilising simple interest with Zactor Tech's intuitive calculator.


No, Zactor Tech's calculator specifically calculates simple interest. For compound interest calculations, we have created a separate calculator.

Yes, Zactor Tech's Simple Interest Calculator is free and accessible to everyone.

Absolutely! Zactor Tech's calculator is designed to be responsive and works seamlessly on both desktop and mobile devices.

Don’t let your goals slip away

Start planning your roadmap today and take control of your finances.

Other Calculators


Term Insurance

Income Tax Calculator

Retirement Calculator


Mutual Fund






Car Loan EMI

Home Loan EMI

Compound Interest